Small Process Equipment

Gold Leaching Equipment, Circuits & Process Plants

Small Gold PlantGold Leaching Circuits & Equipment

In Leaching for Gold, there is often a tendency to overlook or minimize the importance of the small mine. The small mine of today may develop into the large mine of tomorrow. Under proper management and financing it has as good a chance of yielding a profit as the larger property. Unfortunately large capital is seldom interested in them and they are left to the small groups who are not in a position to obtain the best engineering service. Mills are often erected without proper metallurgical tests and expensive Gold Leaching plant equipment are installed at a time when such large expenditures of capital on the surface is not justified by the underground developments. Careful metallurgical testing on the ore might have disclosed the fact that a simple method of amalgamation or concentration could have been employed and the mill built for a third the cost of a Gold Leaching plant.

By taking advantage of the fact that gold is one of the heaviest metals known and readily forms an amalgam with mercury, an effective but simple and inexpensive plant can be built for most small gold ….Read more

Mobile Ore Processing & Beneficiation Plant

One of the most serious problems confronting the mining industry today is how to profitably begin the small scale milling of ores from mines where insufficient ore has been developed to warrant an expensive mill installation, but where a large plant might be needed later. The same question arises in connection with the economical working of numerous small but relatively high grade ore deposits.

Portable Mills, and in particular, Truck Mills, are a most practical solution to this problem. For a relatively small investment a complete and efficient mill can be brought to the mine and speedily put into operation.

Some of the advantages obtained with Portable Mills are summed up as follows:

  1. Low initial cost for a complete mill which is ready to operate;
  2. Mill can be easily transported from one place to another;
  3. Small isolated ore deposits can be worked that would not justify a permanent mill installation;
  4. Flexibility of the equipment furnished, and in particular the flexibility of the “Sub-A” Flotation Machine, enables the operator to easily and rapidly work out the most efficient flowsheet for the ore to be treated.
  5. Provides a plant to mill ore produced during the development period of prospective large producers. This ….Read more

100 to 125 TPD Process Plant Design & Equipment

The 100 to 125 Ton/Day Mill is arranged along the same standard lines as the smaller mills, and a large oversize forced feed crusher is recommended for primary crushing. An intermediate crusher can be installed later if necessary. Changes can be easily made according to your local conditions. Here too, a Selective Mineral Jig may be advisable on gold ores.

All machines have motor “V” Rope drive, but with slight changes belt drives can be furnished. Drives and flowsheet can be changed to meet your conditions, and by means of the sand pump, products can be returned to any part of the flowsheet. Standard Machines, flexible in design, insure successful and profitable operation. And for a process plant under 50 TPD.

All primary process equipment total around 45000 Kilos OR 100000 lbs in weight.100 to 125 TPD Process Plant Design & Equipment

Small Process Plant Design Construction

 Process Equipment List Motor HP
 10″x 20″ Jaw Crusher 17
 24″x 8′ Belt Ore Feeder 1
 5′ x 8′ Ball ….Read more

Small 50 to 75 TPD Process Plant Design & Equipment List

The 50 to 75 Ton per Day process plant is the most practical size for the average milling plant. The 9″ x 16″ Jaw Crusher (forced feed) produces enough crushed ore for the ball mill on one eight hour shift to run the balance of the mill for twenty-four hours. Oversize primary crushers are recommended for most economical results. Note the flexibility of the flowsheet and the gravity flow through the mill which eliminates elevators, conveyors and pumps (except for middling products).

Advantages include motor “V” Rope drives and ample room. On gold ores a Selective Mineral Jig in the grinding circuit may be advisable.

The simplicity of the flowsheet makes it easy to operate and eliminates difficulties.

For a process plant under 50 TPD

All primary process equipment total around 30000 Kilos OR 65000 lbs in weight.

50-75_TPD_Mineral_Processing_Plant Small_Process_Plant_Construction

Process Equipment ListMotor HP
10″ x 16″ Jaw Crusher 12
15″ x 6′ Belt Ore Feeder 0.5
5′ x 5′ Ball Mill (Steel Head)….Read more

Gold Leaching Plant for Sale


The following estimates are for counter-current decantation cyanide circuits and are based on average grade ore requiring average treatment time. These include precipitation and accessory equipment. The equipment required for a cyanide plant will vary considerably with the value of the ore, the settling rate, the chemical composition of the ore, the hardness, and the degree of grinding required, as well as other important factors. It is very difficult to give accurate estimates on a cyanide mill until the exact flowsheet has been determined. There are so many factors that enter into the cost of a cyanide mill that the following figures must be carefully checked so that ample consideration is given to all these variable factors.
gold leaching plant for sale


Base Metal Ore Processing Plant & Equipment (Copper & Lead+)

These 5 following estimates on flotation mills cover standard practice as used on base metal and non-metallic ores where the majority of values are recoverable by flotation, and where there is sufficient freed mineral in the ball mill discharge to warrant recovery by means of process Equipment like either a Unit Flash Flotation Cell, a concentrating table, or a jig, in the ball mill-classifier circuit. Many gold and silver ores come under this same classification as not enough of the precious metals are present as free metallics to warrant the use of amalgamation. On lead copper ores, the unit flotation cell is recommended, whereas with free gold ores containing coarse metallic gold values, along with sulphides, we recommend Equipment like a Mineral Jig. No elevator or pump is necessary in this circuit when using the unit cell or jig, such as is the case when the table is placed between the ball mill and classifier. Care must be taken when using a table in not permitting the use of too much water in the circuit to interfere with subsequent treatment, therefore the Unit Flash Flotation Cell or Mineral Jig is economical to install and more efficient.

Flowsheets 2B (unit cell), 2J ….Read more

Small Gold Ore Processing Plant

These five illustrated flowsheets fully described in the article “Small Gold Ore Processing Plants” follow a natural sequence. These start with a very simple. Flowsheet AA, and then by the addition of the more extensive equipment, it is possible to take care of slight changes in the ore as well as improve recovery. The following tables include the tonnage handled per day in each mill, the total amount of power required for operation, tons of water needed for milling, weight of machinery and approximate machinery cost for each mill according to the flowsheet utilized. These estimates are based on belt driven machines and are FOB factory. Motor driven equipment costs approximately ten per cent more than belt driven.


This flowsheet is the lowest priced possible and can be used on an ore with a high-percentage of free gold values and where the values are unlocked at reasonably coarse grinding.

COST of Small Gold Processing Plants Mobile gold processing plant for sale

Gold Ore Processing Plant for sale….Read more

Cyanide Processing Equipment and Plant Configuration Options

The Jig, placed between the ball mill and classifier, is one of the most valuable and affordable improvements in cyanidation in recent years and was developed by the metallurgical engineering and Mining Equipment Companies.

This Mineral Jig has the marked advantage of removing a large portion of the metallic values without excessive dilution, and water or solution is added to the discharge of the jig.

This jig handles the grinding mill discharge before it enters the classifier for final separation of the coarse material to be reground and the fine material for subsequent treatment by cyanidation. No elevators or pumps are needed in this jig circuit.

The hutch product secured from the Mineral Jig can be treated in a Amalgamator, or by other similar practical means.

Another important unit in these modern flowsheets is the Unit Flash Flotation Cell. This removes the cyanicides and other coarse floatable mineral and is an efficient unit in the grinding circuit due to the use of rubber wearing parts and the distinct gravity flow principle of the Unit Cell.

Flotation_with_cyanidation_of_flotation_tailings Gold processing equipment example

The discharge from the Unit Cell is higher than the feed inlet, thus making it ….Read more

Gravity Recovery OR Flotation Circuits ahead of Gold Cyanide Leaching

Process Flowsheet NO. CY-3 is shown one of the outstanding improvements made in cyanidation whereby the coarse metallic minerals are removed from the grinding circuit by means of the Mineral Jig. The hutch product from this jig is amalgamated with a Amalgamator or Clean-Up Pan and thus the coarse mineral values, such as metallic gold, are removed from the circuit before complete fine grinding takes place. This jig hutch product containing most of the fine as well as the coarse metallics, can also be treated by a separate grinding and cyanide treatment plant. This Jig, due to its synchronized valve action, requires the minimum amount of water. Its feed and discharge elevations are sloped as a launder, so that pumps or elevators are not required.

Gravity Gold Recovery with Cyanidation Gold Leaching Circuit Cyanide flowsheet using a jig to remove coarse free gold minerals and metallic. Concentrates are treated in Amalgamator.

By the early removal of the coarse gold and other minerals, it is possible to materially reduce the chemical consumption in the cyanide plant and also the time required for agitation, as well as offering ….Read more

Counter Current Decantation Cyanide Gold Leaching

The Process Flowsheet CCD CY-1 shows (below) the continuous counter-current decantation system, in which all the ore is first reduced to a very fine state in the grinding mill-classifier circuit, in a cyanide solution. The slime overflow of the classifier, usually 70%—200 mesh, or finer, is sent to the first thickener, known as the primary thickener.

Here the pregnant solution, containing a large part of the dissolved gold and silver values, overflows from the top of the thickener and is sent to a clarifier. then to the precipitating system where the gold and silver values are precipitated, the precipitate periodically being reduced to bullion in a furnace.

The underflow pulp of the primary thickener, containing the remaining values and usually at a pulp ratio of 1:1, is elevated by a diaphragm pump into a series of agitators. The agitators are used to aid in the dissolution of the remaining values, augmented by the introduction of air. The time of treatment required depends upon the values still remaining in the slimes or fine sands in the mill pulps.

From the agitators, the pulp at a density of approximately 1:1 overflows directly into ….Read more

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